Classic Trader, Europe’s largest classic car trading website, has announced that the total value of vehicles currently on sale on the site has eclipsed €1 billion for the first time. To mark the occasion, the website has revealed the most popular makes and models, ranked by the number of listings that currently appear on the site.

Porsche dominates the list, with four different 911s appearing in the top ten. Here, we rank the cars in reverse order.

10. Jaguar E-type Series 1

Average asking price: £139,100

With an average asking price of £139,100, the Jaguar E-type S1 – or XKE in the US – is the most valuable car in the top 10 and arguably the most beautiful. “If a new car ever created greater excitement around our office than the new Jaguar XKE, we can’t remember it”, said Road & Track in September 1961.

The E-Type went on sale in 1961 with a bargain price tag, including taxes, of £2,097 for the convertible and £2,196 for the coupe. It was replaced in 1968 by the less desirable, and therefore less valuable, Series 2.

9. Mercedes-Benz SL R129

Average asking price: £19,100

Few cars have aged as well as the Mercedes-Benz SL R129. Unveiled at the 1989 Geneva Motor Show, the response was so positive, anyone who placed an order was forced to accept a delivery period of several years. Production continued until 2001, by which time more than 200,000 units had rolled off the Bremen production line.

The last truly beautiful Mercedes (discuss…) was the first car to feature an automatic roll-over bar, along with a soft-top that could be opened or closed within 30 seconds. The most common model is the 5.0-litre V8, with some 79,827 units built, while the entry-level SL 280 V6 is the rarest.

8. Porsche 993

Average asking price: £81,900

If Mercedes-Benz struggled to keep up with demand for the R129, Porsche had a similar ‘problem’ with the 993. Launched in 1994, the 993 was able to boast a series of technical and visual changes, with only the doors and front bonnet carried over from the 964.

As the last air-cooled Porsche, the 993 is one of the most sought-after 911s on the classic car market, hence the average asking price. In the Ultimate History of Porsche, current editor of Evo magazine, Stuart Gallagher, wrote: “The fact that Porsche arrived at this beautifully honed vehicle when it did is fitting, because as the sun set on 1997 the air-cooled 911 had come to the end of its long and illustrious life.”

7. Alfa Romeo Giulia

Average asking price: £30,700

The Alfa Romeo Giulia was introduced in 1962 and wouldn’t bow out until 1977. In that time it evolved and spawned many variants, establishing the Alfa Romeo brand as we know it today. Regardless of the body shape, the Giulia was a true drivers’ car.

According to Classic Trader, the cars featured in the top 10 represent almost 12% of the total trading volume on the website, resulting in sales of €118 million. Other cars, such as the Citroen LNA, Saab 90 and Toyota Tercel weren’t able to contribute quite as much.

6. Mercedes-Benz SL W113

Average asking price: £83,600

The fact that three generations of Mercedes-Benz SL appear in the top 10 suggests that the car is in strong demand. The W113 had the unenviable task of following the first generation SL, something it managed with startling ease. It’s all about the oh-so-pretty styling, with its hardtop earning it the nickname of ‘Pagoda’.

In truth, the second coming of the SL was more boulevard cruiser than it was precision instrument, but it remained a thing of beauty. This was the first sports car to feature crumple zones and a rigid passenger cell.

5. Fiat 500

Average asking price: £9,800

The smallest car in the top 10 has a fittingly small price tag. The Fiat Nuova 500 was unveiled in 1957 and helped mobilise an entire nation. It measured just 9-feet long and was one of the very first city cars ever built. Perfect for navigating the congested streets of Turin, Rome and Milan.

The early cars featured suicide doors, but these were phased out in 1965 amid safety fears. Nearly 3.5 million units were built before production ceased in 1975 and the 500 was replaced by the 126.

4. Porsche 964

Average asking price: £62,300

To the untrained eye, the Porsche 964 looked like an evolution of the outgoing 911, but it was in fact 85% new. The Carrera 4 was the first 911 to feature an all-wheel drive system, sending 31% of the torque to the front and 69% to the rear.

Power was sourced from a 3.6-litre flat-six engine, itself a development of the 3.2-litre unit found in the outgoing 3.2 Carrera. The all-wheel drive 964 may have upset the purists, but it appealed to a broader and affluent audience, with strong sales helping to secure Porsche’s future. Besides, a rear-wheel-drive variant arrived in 1990.

3. Mercedes-Benz SL R107

Average asking price: £24,700

The SL R107 enjoyed a near two-decade production run, making it the second longest single series Mercedes-Benz after the G-Class. Just like its predecessors, the R107 – introduced in 1971 – was a huge hit on the tree-lined boulevards of America.

At the time of preparing this feature, there are 626 Mercedes-Benz SL models for sale on Classic Trader. Prices range from £3,995 for a 1982 380 SL to £1.6 million for a 1956 300 SL ‘Gullwing’.

2. Porsche 911 pre-impact bumper

Average asking price: £98,100

In 1974, Porsche was forced into redesigning the 911 to satisfy new US safety regulations. The result was the so-called ‘impact bumper’, designed to keep their shape in the event of a 5mph accident. Many would argue that the new bumper only served to dilute the purity of the original 911.

The Porsche 901 – renamed the 911 as of model year 1965 – was unveiled at the 1963 Frankfurt Motor Show as a successor to the 356. Right now, there are more than 1,000 Porsche of all types for sale on Classic Trader, with prices ranging from £15,215 to £1.4 million.

1. Porsche 911 impact bumper

Average asking price: £55,500

Regardless of what you think about the impact bumpers, the G-Series remains one of the most iconic 911s of all-time. It was, after all, the sports car so beloved of the ‘Yuppie’ generation, all red braces, shoulder pads and mobile phones the size of bricks.

The design of the impact bumpers differed according to the market. In the US, the bumpers were connected to the body using hydraulic impact absorbers, while non-US cars used more cost-effective impact pipes. In 1989, the G-Series was replaced by the 964.

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